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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >The effect of calcium doping on the improvement of performance and durability in a layered perovskite cathode for intermediate-temperature solid oxide fuel cells
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The effect of calcium doping on the improvement of performance and durability in a layered perovskite cathode for intermediate-temperature solid oxide fuel cells

机译：钙掺杂对中温固体氧化物燃料电池层状钙钛矿阴极性能和耐久性改善的影响

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摘要

Layered perovskite oxides have received extensive attention as promising cathode materials for solid oxide fuel cells (SOFCs) because of their faster diffusion coefficient and oxygen transport kinetics. With the goals of enhancing electrochemical properties and improving the durability, this study focuses on the effect of calcium (Ca) doping in PrBa0.5Sr0.5-xCaxCo2O5+delta (x = 0 and 0.25) layered perovskite oxides through an investigation of their structural characteristics, electrical properties, redox behavior, electrochemical performances, and stability. In the temperature range of 100-750 degrees C, the electrical conductivity of PrBa0.5Sr0.25Ca0.25Co2O5+delta (PBSCaCO) is higher than that of Ca-free PrBa0.5Sr0.5Co2O5+delta (PBSCO). The area specific resistance (ASR) value of PBSCaCO-GDC (0.079 Omega cm(2)) is lower than that of PBSCO-GDC (0.093 Omega cm(2)) at 600 degrees C, based on a GDC electrolyte. Moreover, PBSCaCO-GDC achieves a good performance of 1.83 W cm(-2) at 600 degrees C. PBSCaCO shows a stable power output without observable degradation for 100 h. On the basis of these results, the PBSCaCO cathode is an excellent candidate for IT-SOFC applications.
机译：层状钙钛矿氧化物因其较快的扩散系数和氧传输动力学而作为固体氧化物燃料电池（SOFC）的有希望的阴极材料受到广泛关注。为了增强电化学性能并提高耐用性，本研究通过研究结构中钙（Ca）掺杂对PrBa0.5Sr0.5-xCaxCo2O5 +δ（x = 0和0.25）层状钙钛矿氧化物的影响。特性，电性能，氧化还原行为，电化学性能和稳定性。在100-750摄氏度的温度范围内，PrBa0.5Sr0.25Ca0.25Co2O5 +δ（PBSCaCO）的电导率高于无钙PrBa0.5Sr0.5Co2O5 +δ（PBSCO）的电导率。基于GDC电解质，PBSCaCO-GDC（0.079Ωcm（2））的面积比电阻（ASR）值在600摄氏度时低于PBSCO-GDC（0.093Ωcm（2））。此外，PBSCaCO-GDC在600摄氏度下具有1.83 W cm（-2）的良好性能。PBSCaCO显示稳定的功率输出，且100小时未观察到降解。根据这些结果，PBSCaCO阴极非常适合IT-SOFC应用。

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